#include <iostream>
#include <string>



int main()
{   
    std::string str = "hello";
    std::cout<<str<<std::endl;
    //strlen
    std::cout<<str.size()<<std::endl;
    //strcpy
    str = "world";
    std::cout<<str<<std::endl;
    //strcat
    str += "hello";
    std::cout<<str<<std::endl;
    //strcmp
    std::string s1 = "hello";
    std::string s2 = "hello";
    std::cout<< (s1 == s2)<<std::endl;
    return 0;
}